Nasa says large CME on Sun headed for Earth: Expected Arrival August 3rd

On Sunday, NASA's Solar Dynamics Observatory detected a complex magnetic eruption on the sun. The NASA Solar and Heliospheric Observatory (SOHO) also spotted a large coronal mass ejection (CME) The eruption happened around (3:50 am EST), the SDO detected a C3 class solar flare originating from a group of sunspots (called sunspot 1092). The flare itself was not that large, but the filament located about 70,000 miles away erupted at the same time.
A filament is a large, bright feature extending outward from the Sun's surface, often in a loop shape. Filament is anchored to the Sun's surface in the photosphere, and extends outward into the Sun's corona. It is a long magnetic structure rising above the surface of the sun, filled with cool plasma. The flare and filament erupted at the same time, this suggests they are connected by long-range magnetic field lines. Some believe the flare may have accelerated the eruption of the filament. Eventually, a giant magnetic bubble of plasma broke and blasted out into space.